When generating into a world with seed- -8249628662691282878, you can see very weird stuff. For example, just at spawn (/execute in minecraft:overworld run tp @s 67.22 78.13 183.95 214.91 61.74) you see the water body with dirt surrounding it, which shouldn't happen. when you tp to /execute in minecraft:overworld run tp @s -491.26 67.87 53.05 -19.37 42.02, you can see the ores are exposed surrounding the lava pool, looking very unnatural.